Method of making artificial stone.



UNITED STATES soREN SCHOUGAARD, OF

PATENT Omen.

COPENHAGEN, DENMARK.

METHOD OF MAKING ARTIFICIAL STON E.

SPECIFICATION forming part of Letters Patent No. 657,296, dated September 4, 1900. Application filed May 31, 1900. Serial No. 18,526. (No specimens.)

ToaZZ whom it may concern.-

Be it known that 1, 86min SOHOUGAARD, master mason, a subject of the King of Denmark, residing at Norrebrogade 42, Copenhagen, Denmark, have invented an Improved Method of Making Artificial Marble, (for which I have made application for a Danish patent, dated'January 22, 1900,) of which the following is a specification.

My invention relates to an improved method of making artificial marble.

' The hitherto-known methods of making artificial marbleare subject to several drawbacks, and among others the difficulty in producing large slabs of sufficient thinness not liable to warping. Another drawback consists in the necessity of liberally greasing the molds wherein the mass is shaped to prevent the mass from sticking to them when the molds are to be emptied. These drawbacks do not in the least attach to the method of my invention, and which is as follows: Reckoning by measure, two parts of animal glue, four parts of alum, and 0.8 parts of gum-arabic are dissolved in one hundred parts of water, whereafter so much double-burnt gypsum is added as to produce a pappy mass of convenient consistency, to the Whole being finally added a color soluble in water and similar to the color of the marble to'be imitated. To produce artificial marble slabs, the thus-prepared mass is extended in thin layers of about I two centimeters thickness either on a plate the like need to be greased, as theabove mass does not stick to any.surface. On having completely hardened the produce can be polished either with wax, polishing spirits, or in any other convenient manner.

What I claim, and desire to secure by Letters Patent of the United States, is*

The method of making artificial stone consisting in dissolving animal glue, alum and gum-arabic in water in about the proportions stated, adding to this mixture so much d oubleburnt gypsum as to produce a pappy mass of convenient consistency, mixing therewith a color soluble in water and molding the mass in the shapes into which it is to harden.

I In testimony whereof I affix my signature in presence of two witnesses.

SOREN SCHOUGAARD.

Witnesses:

A. POULSEN,

J G. J ACOBSEN.

the like-.molds are. used in the ordinary way. Neitherthese molds nor the glass plate and I 

